Sa'id bin al Musayyib heard Sa'd bin Abi Waqqas (RA) saying that 'Uthman bin Maz'un decided to live in celibacy, but Allah's Messenger (ﷺ) forbade him to do so, and if he had permitted him, we would have got ourselves castrated.
Hadith ReferenceSahih Muslim / The Book of Marriage / Hadith: 1402